Improvement in attaching plow-points



UNTTnn STaTns aTnNT Trucs.

GEORGE W. HILDRETH, OF' LOOKPORT, NEW YORK.

IMPROVEMENT IN ATTACHING PLOW-POINTS.

Specification forming part of Letters Patent No. 1113,665, dated April11, 1871.

To all whom it may concern Be it known that I, GEORGE W. HILDRETH, ofLockport, in the county of Niagara and State of New York, have inventedcertain Improvements in the Manner of Attaching Plow-Points to the Plow,of which the following is a speciftcation.

My invention relates tothe manner of attaching a plow-point, which ismade separate from the main plow for the purpose of renewing the wearingpart, as it wears out much faster than the rest ofthe plow, and foraheavy strong plow to stand the power of from four to twelve horses, (asour contractors plow has dona) it becomes a very important matter forthe purpose of grading on railroads, canals, &c. The former plan offastening on thepoims with one or even two bolts on the mold-board sideof the plow, with the small amount of lap that the point has on theplow, compared with the distance that the extreme forward end ofthepoint has to project beyond any bearing under the point to support it,makes it next to impossible to sustain it, espeoially when it isconsidered that this extreme forward end ofthe point has to stand theentire power applied to the plow. Therefore the necessity of somethingmore substantial for that purpose. I have made this kind of a plow formany years with the old-fashioned point upon it7 but never was perfectlysuccessful until lately,by using the improvement herein claimed andspecified.

In the accompanying drawings, Figure l is i a perspective view of themoldboard side of the plow. Fig. 2 is a view of the landside of the mainstock ofthe plow. Fig. 3 is a laudside view ofthe point to be attachedto the main stock of the plow. Fig. 4 is a plan ofFig. 3. Fig. 5 is aplan of Fig. 2. Fig. 6 isafront view of the point when attached to themain stock of the plow, ready for use.

Similar letters of reference indicate corre sponding parts in theseveral figures of the drawings.

Fig. l is aview of a strong truss-plow beam to which my point isattached, showing one bolt at o on the mold-board side, and another at pon the extended shim-piece,77 also seen at p in Figs. 8 and 6.

Fig. 2 shows the stock of the plow on the landside, with a recess orsink at t from onefourth to a half inch deep, to receive the eX- tendedshim-piece a in Fig. 3. So much of it as is on the right hand of thedotted line laps onto the stock, Fig. 2, and the upper end of it is sunkor bedded into said stock its thickness, or thereabout, with a goodbearing on its upper edge at g, so that a strong pressure on the pointat d, Fig. 3, cannot raise it by prying over the nose at e, especiallywhen you add the bolt, which goes through the extended shim and stock att', Figs. 2 and 6. NVith this extended shim made firm, as abovedescribed, we sustain the point d, Figs. l, 3, and so that a depressionof it is almost impossible, when with the ordinary fastening the pointwill give or spring enough to break off the nose ofthe stock at e andruin the stock and plow, which is well understood by every man that hashad much experience with plows, especially for heavy work. The longleverage from It to e in Fig. 3 to sustain the point d, together withthe width ofthe shim up and down, and the boxing ofthe upper end ofitinto the stock,a1id the bolt at p, is what I rely upon to accomplish thedesired object.

Vvhat I mean bythe extended shim-piece is that part of the point whichlaps onto the stock ofthe plow on the landside. When Fig. 3 is placedupon Fig. 2, where it belongs, the surface of it is flush with thelandside, or nearly so.

I do not claim the ordinary shim-piece or cutter, commonly used as asubstitute for a colter for cutting turf, which stands abovethe surfaceofthe mold-board and point, and not bolted to the main stock.

I claim- TheI plow-point, when constructed with the shim-piece a, boxedinto the stock upon the landside and bolted thereto, lapping over saidlandside from e to It, as herein set forth and shown, for the purposespecilied.

Gr. XV. HILDRETH.

Vi tn esses:

J osEPH CLARK, DANrEL MOKIM.

